annotate src/samer/j3d/MatrixPointArrayRef.java @ 8:5e3cbbf173aa tip

Reorganise some more

package	samer.j3d;

import samer.core.types.*;
import samer.maths.*;
import java.util.*;
import javax.media.j3d.*;
import javax.vecmath.*;


public class MatrixPointArrayRef extends PointArray implements Observer
{
	int			N;	// number of points
	Matrix		P;	// 3d positions of points
	VVector		A;	// scalar activations
	VDouble		K;  // scaling factor for activations

	GeometryUpdater	updater;

	float		carray[];	// array for holding colours
//	Color3f		carray[];

	public MatrixPointArrayRef(Matrix points, VVector activities)
	{
		super(points.getRowDimension(), BY_REFERENCE | COORDINATES | COLOR_3);

		N=points.getRowDimension();
		P=points;
		A=activities;
		K=new VDouble("scale",1);

		carray=new float[3*N];

		// set capabilities for subsequent updates
		setCapability(ALLOW_REF_DATA_WRITE);

		{
			double [] a=A.array();
			for (int i=0; i<N; i++) a[i]=1;
		}

		updater = new GeometryUpdater() {
			public void updateData(Geometry g)
			{
				// load colours
				double [] a=A.array();
				double	  k=K.value;

				for (int i=0, j=0; i<N; i++,j+=3) {
					float ai=(float)(a[i]*k);
					carray[j]=ai;
					carray[j+1]=0.8f*ai;
					carray[j+2]=0.4f*ai;
				}
			}
		};

		updater.updateData(this);

		setColorRefFloat(carray);
		setCoordRefDouble(P.getRowPackedCopy());

		A.addObserver(this);
/*
		P.addObserver(new Observer () {
			public void update(Observable o, Object a) {
				updatePoints();
			}
		});
 */
	}


	public void update(Observable o, Object a) { updateData(updater); }
}